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|
/**
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package direct_bt.tinyb;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import org.tinyb.AdapterStatusListener;
import org.tinyb.BLERandomAddressType;
import org.tinyb.BTSecurityLevel;
import org.tinyb.BluetoothAddressType;
import org.tinyb.BluetoothDevice;
import org.tinyb.BluetoothException;
import org.tinyb.BluetoothGattCharacteristic;
import org.tinyb.BluetoothGattDescriptor;
import org.tinyb.BluetoothGattService;
import org.tinyb.BluetoothNotification;
import org.tinyb.BluetoothObject;
import org.tinyb.BluetoothType;
import org.tinyb.EIRDataTypeSet;
import org.tinyb.EUI48;
import org.tinyb.GATTCharacteristicListener;
import org.tinyb.HCIStatusCode;
import org.tinyb.PairingMode;
import org.tinyb.SMPIOCapability;
import org.tinyb.SMPPairingState;
public class DBTDevice extends DBTObject implements BluetoothDevice
{
private static final boolean DEBUG = DBTManager.DEBUG;
/** Device's adapter weak back-reference */
private final WeakReference<DBTAdapter> wbr_adapter;
private final EUI48 address;
private final BluetoothAddressType addressType;
private final BLERandomAddressType leRandomAddressType;
private final long ts_creation;
private volatile String name;
volatile long ts_last_discovery;
volatile long ts_last_update;
volatile short hciConnHandle;
/* pp */ final List<WeakReference<DBTGattService>> serviceCache = new ArrayList<WeakReference<DBTGattService>>();
private final AtomicBoolean isClosing = new AtomicBoolean(false);
private final Object userCallbackLock = new Object();
private final long blockedNotificationRef = 0;
private BluetoothNotification<Boolean> userBlockedNotificationsCB = null;
private final AtomicBoolean isBlocked = new AtomicBoolean(false);
private final long pairedNotificationRef = 0;
private BluetoothNotification<Boolean> userPairedNotificationsCB = null;
private final AtomicBoolean isPaired = new AtomicBoolean(false);
private final long trustedNotificationRef = 0;
private BluetoothNotification<Boolean> userTrustedNotificationsCB = null;
private final AtomicBoolean isTrusted = new AtomicBoolean(false);
private BluetoothNotification<Boolean> userConnectedNotificationsCB = null;
private final AtomicBoolean isConnected = new AtomicBoolean(false);
private BluetoothNotification<Short> userRSSINotificationsCB = null;
private BluetoothNotification<Map<Short, byte[]> > userManufDataNotificationsCB = null;
private BluetoothNotification<Boolean> userServicesResolvedNotificationsCB = null;
private final AtomicBoolean servicesResolved = new AtomicBoolean(false);
private short appearance = 0;
final AdapterStatusListener statusListener = new AdapterStatusListener() {
@Override
public void deviceUpdated(final BluetoothDevice device, final EIRDataTypeSet updateMask, final long timestamp) {
final boolean nameUpdated = updateMask.isSet( EIRDataTypeSet.DataType.NAME );
final boolean rssiUpdated = updateMask.isSet( EIRDataTypeSet.DataType.RSSI );
final boolean mdUpdated = updateMask.isSet( EIRDataTypeSet.DataType.MANUF_DATA );
if( nameUpdated ) {
final String oldName = DBTDevice.this.name;
DBTDevice.this.name = getNameImpl();
if( DEBUG ) {
System.err.println("Device.StatusListener.UPDATED: NAME: '"+oldName+"' -> '"+DBTDevice.this.name+"'");
}
}
if( rssiUpdated || mdUpdated ) {
synchronized(userCallbackLock) {
if( rssiUpdated && null != userRSSINotificationsCB ) {
userRSSINotificationsCB.run(getRSSI());
}
if( mdUpdated && null != userManufDataNotificationsCB ) {
userManufDataNotificationsCB.run(getManufacturerData());
}
}
}
}
@Override
public void deviceConnected(final BluetoothDevice device, final short handle, final long timestamp) {
if( isConnected.compareAndSet(false, true) ) {
synchronized(userCallbackLock) {
if( null != userConnectedNotificationsCB ) {
userConnectedNotificationsCB.run(Boolean.TRUE);
}
if( servicesResolved.compareAndSet(false, true) ) {
if( null != userServicesResolvedNotificationsCB ) {
userServicesResolvedNotificationsCB.run(Boolean.TRUE);
}
}
}
}
}
@Override
public void deviceDisconnected(final BluetoothDevice device, final HCIStatusCode reason, final short handle, final long timestamp) {
devicePaired(false);
if( isConnected.compareAndSet(true, false) ) {
clearServiceCache();
synchronized(userCallbackLock) {
if( servicesResolved.compareAndSet(true, false) ) {
if( null != userServicesResolvedNotificationsCB ) {
userServicesResolvedNotificationsCB.run(Boolean.FALSE);
}
}
if( null != userConnectedNotificationsCB ) {
userConnectedNotificationsCB.run(Boolean.FALSE);
}
}
}
}
};
final private BluetoothNotification<Boolean> blockedNotificationsCB = new BluetoothNotification<Boolean>() {
@Override
public void run(final Boolean value) {
if( DEBUG ) {
System.err.println("Device.BlockedNotification: "+isBlocked+" -> "+value+" on "+DBTDevice.this.toString());
}
final boolean _isBlocked = value.booleanValue();
if( isBlocked.compareAndSet(!_isBlocked, _isBlocked) ) {
synchronized(userCallbackLock) {
if( null != userBlockedNotificationsCB ) {
userBlockedNotificationsCB.run(value);
}
}
}
}
};
final private void devicePaired(final boolean _isPaired) {
if( DEBUG ) {
System.err.println("Device.PairedNotification: "+isPaired+" -> "+_isPaired+" on "+DBTDevice.this.toString());
}
if( isPaired.compareAndSet(!_isPaired, _isPaired) ) {
synchronized(userCallbackLock) {
if( null != userPairedNotificationsCB ) {
userPairedNotificationsCB.run(_isPaired);
}
}
}
}
final private BluetoothNotification<Boolean> pairedNotificationsCB = new BluetoothNotification<Boolean>() {
@Override
public void run(final Boolean value) {
devicePaired( value.booleanValue() );
}
};
final private BluetoothNotification<Boolean> trustedNotificationsCB = new BluetoothNotification<Boolean>() {
@Override
public void run(final Boolean value) {
if( DEBUG ) {
System.err.println("Device.TrustedNotification: "+isTrusted+" -> "+value+" on "+DBTDevice.this.toString());
}
final boolean _isTrusted = value.booleanValue();
if( isTrusted.compareAndSet(!_isTrusted, _isTrusted) ) {
synchronized(userCallbackLock) {
if( null != userTrustedNotificationsCB ) {
userTrustedNotificationsCB.run(value);
}
}
}
}
};
/* pp */ DBTDevice(final long nativeInstance, final DBTAdapter adptr,
final byte byteAddress[/*6*/],
final byte byteAddressType,
final String name, final long ts_creation)
{
super(nativeInstance, java.util.Arrays.hashCode(byteAddress));
this.wbr_adapter = new WeakReference<DBTAdapter>(adptr);
this.address = new EUI48(byteAddress);
this.addressType = BluetoothAddressType.get(byteAddressType);
if( BluetoothAddressType.BDADDR_UNDEFINED == addressType ) {
throw new IllegalArgumentException("Unsupported given native addresstype "+byteAddressType);
}
this.leRandomAddressType = address.getBLERandomAddressType(addressType);
this.ts_creation = ts_creation;
this.name = name;
ts_last_discovery = ts_creation;
ts_last_update = ts_creation;
hciConnHandle = 0;
appearance = 0;
initImpl();
adptr.addStatusListener(statusListener, this); // only for this device
enableBlockedNotificationsImpl(blockedNotificationsCB);
enablePairedNotificationsImpl(pairedNotificationsCB);
// FIXME enableTrustedNotificationsImpl(trustedNotificationsCB);
}
@Override
public void close() {
if( !isValid() ) {
return;
}
if( !isClosing.compareAndSet(false, true) ) {
return;
}
disableConnectedNotifications();
disableRSSINotifications();
disableManufacturerDataNotifications();
disableServicesResolvedNotifications();
disableBlockedNotifications();
disableBlockedNotificationsImpl();
disablePairedNotifications();
disablePairedNotificationsImpl();
disableServiceDataNotifications();
disableTrustedNotifications();
// FIXME disableTrustedNotificationsImpl();
clearServiceCache();
final DBTAdapter a = getAdapter();
if( null != a ) {
a.removeStatusListener(statusListener);
a.removeDiscoveredDevice(this);
}
super.close();
}
@Override
public boolean equals(final Object obj)
{
if(this == obj) {
return true;
}
if (obj == null || !(obj instanceof DBTDevice)) {
return false;
}
final DBTDevice other = (DBTDevice)obj;
return address.equals(other.address) && addressType.equals(other.addressType);
}
@Override
public final long getCreationTimestamp() { return ts_creation; }
@Override
public final long getLastDiscoveryTimestamp() { return ts_last_discovery; }
@Override
public final long getLastUpdateTimestamp() { return ts_last_update; }
@Override
public DBTAdapter getAdapter() { return wbr_adapter.get(); }
@Override
public EUI48 getAddress() { return address; }
@Override
public String getAddressString() { return address.toString(); }
@Override
public BluetoothAddressType getAddressType() { return addressType; }
@Override
public BLERandomAddressType getBLERandomAddressType() { return leRandomAddressType; }
@Override
public String getName() { return name; }
private native String getNameImpl();
@Override
public BluetoothType getBluetoothType() { return class_type(); }
static BluetoothType class_type() { return BluetoothType.DEVICE; }
@Override
public BluetoothGattService find(final String UUID, final long timeoutMS) {
return (DBTGattService) findInCache(UUID, BluetoothType.GATT_SERVICE);
}
@Override
public BluetoothGattService find(final String UUID) {
return find(UUID, 0);
}
/* Unsupported */
@Override
public int getBluetoothClass() { throw new UnsupportedOperationException(); } // FIXME
@Override
public final BluetoothDevice clone() { throw new UnsupportedOperationException(); } // FIXME
@Override
public final boolean pair() throws BluetoothException {
return false;
}
@Override
public final HCIStatusCode unpair() {
return HCIStatusCode.get( unpairImpl() );
}
private final native byte unpairImpl();
@Override
public final boolean setConnSecurityLevel(final BTSecurityLevel sec_level) {
return setConnSecurityLevelImpl(sec_level.value);
}
private final native boolean setConnSecurityLevelImpl(final byte sec_level);
@Override
public final BTSecurityLevel getConnSecurityLevel() {
return BTSecurityLevel.get( getConnSecurityLevelImpl() );
}
private final native byte getConnSecurityLevelImpl();
@Override
public final boolean setConnIOCapability(final SMPIOCapability io_cap) {
return setConnIOCapabilityImpl(io_cap.value);
}
private final native boolean setConnIOCapabilityImpl(final byte io_cap);
@Override
public final SMPIOCapability getConnIOCapability() {
return SMPIOCapability.get( getConnIOCapabilityImpl() );
}
private final native byte getConnIOCapabilityImpl();
@Override
public final boolean setConnSecurity(final BTSecurityLevel sec_level, final SMPIOCapability io_cap) {
return setConnSecurityImpl(sec_level.value, io_cap.value);
}
private final native boolean setConnSecurityImpl(final byte sec_level, final byte io_cap);
@Override
public final boolean setConnSecurityBest(final BTSecurityLevel sec_level, final SMPIOCapability io_cap) {
if( BTSecurityLevel.UNSET.value < sec_level.value && SMPIOCapability.UNSET.value != io_cap.value ) {
return setConnSecurity(sec_level, io_cap);
} else if( BTSecurityLevel.UNSET.value < sec_level.value ) {
if( BTSecurityLevel.ENC_ONLY.value >= sec_level.value ) {
return setConnSecurity(sec_level, SMPIOCapability.NO_INPUT_NO_OUTPUT);
} else {
return setConnSecurityLevel(sec_level);
}
} else if( SMPIOCapability.UNSET.value != io_cap.value ) {
return setConnIOCapability(io_cap);
} else {
return false;
}
}
@Override
public HCIStatusCode setPairingPasskey(final int passkey) {
return HCIStatusCode.get( setPairingPasskeyImpl(passkey) );
}
private native byte setPairingPasskeyImpl(final int passkey) throws BluetoothException;
@Override
public HCIStatusCode setPairingNumericComparison(final boolean equal) {
return HCIStatusCode.get( setPairingNumericComparisonImpl(equal) );
}
private native byte setPairingNumericComparisonImpl(final boolean equal);
@Override
public PairingMode getPairingMode() {
return PairingMode.get( getPairingModeImpl() );
}
private native byte getPairingModeImpl();
@Override
public SMPPairingState getPairingState() {
return SMPPairingState.get( getPairingStateImpl() );
}
private native byte getPairingStateImpl();
@Override
public final boolean cancelPairing() throws BluetoothException {
// FIXME: Not supporter (yet)
return false;
}
@Override
public String getAlias() { return null; } // FIXME
@Override
public void setAlias(final String value) { throw new UnsupportedOperationException(); } // FIXME
/* internal */
private native void initImpl();
/* DBT method calls: Connection */
@Override
public final void enableConnectedNotifications(final BluetoothNotification<Boolean> callback) {
synchronized(userCallbackLock) {
userConnectedNotificationsCB = callback;
}
}
@Override
public final void disableConnectedNotifications() {
synchronized(userCallbackLock) {
userConnectedNotificationsCB = null;
}
}
@Override
public final boolean getConnected() { return isConnected.get(); }
@Override
public final short getConnectionHandle() { return hciConnHandle; }
@Override
public final HCIStatusCode disconnect() throws BluetoothException {
if( isConnected.get() ) {
return HCIStatusCode.get( disconnectImpl() ); // event callbacks will be generated by implementation
}
return HCIStatusCode.CONNECTION_TERMINATED_BY_LOCAL_HOST;
}
private native byte disconnectImpl() throws BluetoothException;
@Override
public final HCIStatusCode connect() throws BluetoothException {
if( !isConnected.get() ) {
return HCIStatusCode.get( connectDefaultImpl() ); // event callbacks will be generated by implementation
}
return HCIStatusCode.CONNECTION_ALREADY_EXISTS;
}
private native byte connectDefaultImpl() throws BluetoothException;
@Override
public HCIStatusCode connectLE(final short le_scan_interval, final short le_scan_window,
final short conn_interval_min, final short conn_interval_max,
final short conn_latency, final short timeout) {
if( !isConnected.get() ) {
// event callbacks will be generated by implementation
if( 0 > le_scan_interval || 0 > le_scan_window || 0 > conn_interval_min ||
0 > conn_interval_max || 0 > conn_latency || 0 > timeout ) {
return HCIStatusCode.get( connectLEImpl0() );
} else {
return HCIStatusCode.get( connectLEImpl1(le_scan_interval, le_scan_window, conn_interval_min, conn_interval_max, conn_latency, timeout) );
}
}
return HCIStatusCode.CONNECTION_ALREADY_EXISTS;
}
private native byte connectLEImpl0();
private native byte connectLEImpl1(final short le_scan_interval, final short le_scan_window,
final short conn_interval_min, final short conn_interval_max,
final short conn_latency, final short timeout);
/* DBT Java callbacks */
@Override
public final void enableRSSINotifications(final BluetoothNotification<Short> callback) {
synchronized(userCallbackLock) {
userRSSINotificationsCB = callback;
}
}
@Override
public final void disableRSSINotifications() {
synchronized(userCallbackLock) {
userRSSINotificationsCB = null;
}
}
@Override
public final void enableManufacturerDataNotifications(final BluetoothNotification<Map<Short, byte[]> > callback) {
synchronized(userCallbackLock) {
userManufDataNotificationsCB = callback;
}
}
@Override
public final void disableManufacturerDataNotifications() {
synchronized(userCallbackLock) {
userManufDataNotificationsCB = null;
}
}
@Override
public final void enableServicesResolvedNotifications(final BluetoothNotification<Boolean> callback) {
synchronized(userCallbackLock) {
userServicesResolvedNotificationsCB = callback;
}
}
@Override
public void disableServicesResolvedNotifications() {
synchronized(userCallbackLock) {
userServicesResolvedNotificationsCB = null;
}
}
@Override
public boolean getServicesResolved () { return servicesResolved.get(); }
@Override
public short getAppearance() { return appearance; }
@Override
public void enableBlockedNotifications(final BluetoothNotification<Boolean> callback) {
synchronized(userCallbackLock) {
userBlockedNotificationsCB = callback;
}
}
@Override
public void disableBlockedNotifications() {
synchronized(userCallbackLock) {
userBlockedNotificationsCB = null;
}
}
@Override
public boolean getBlocked() { return isBlocked.get(); }
@Override
public void setBlocked(final boolean value) {
setBlockedImpl(value);
}
@Override
public void enableServiceDataNotifications(final BluetoothNotification<Map<String, byte[]> > callback) {
// FIXME: Isn't this GATTCharacteristic data notification/indication? Then map it or drop!
}
@Override
public Map<String, byte[]> getServiceData() {
return null; // FIXME
}
@Override
public void disableServiceDataNotifications() {
// FIXME
}
@Override
public void enablePairedNotifications(final BluetoothNotification<Boolean> callback) {
synchronized(userCallbackLock) {
userPairedNotificationsCB = callback;
}
}
@Override
public void disablePairedNotifications() {
synchronized(userCallbackLock) {
userPairedNotificationsCB = null;
}
}
@Override
public final boolean getPaired() { return isPaired.get(); }
@Override
public void enableTrustedNotifications(final BluetoothNotification<Boolean> callback) {
synchronized(userCallbackLock) {
userTrustedNotificationsCB = callback;
}
}
@Override
public void disableTrustedNotifications() {
synchronized(userCallbackLock) {
userTrustedNotificationsCB = null;
}
}
@Override
public boolean getTrusted() { return isTrusted.get(); }
@Override
public void setTrusted(final boolean value) {
setTrustedImpl(value);
}
@Override
public native boolean getLegacyPairing();
@Override
public final String toString() {
if( !isValid() ) {
// UTF-8 271D = Cross
final String leRandomStr;
if( BLERandomAddressType.UNDEFINED != this.leRandomAddressType ) {
leRandomStr = ", random "+leRandomAddressType.toString();
} else {
leRandomStr = "";
}
return "Device" + "\u271D" + "[address["+address+", "+addressType.toString()+leRandomStr+"], '"+name+
"', connected["+isConnected.get()+", 0x"+Integer.toHexString(hciConnHandle)+"]]";
}
return toStringImpl();
}
/* DBT native callbacks */
private native String toStringImpl();
private native void enableBlockedNotificationsImpl(BluetoothNotification<Boolean> callback);
private native void disableBlockedNotificationsImpl();
private native void setBlockedImpl(final boolean value);
// Note that this is only called natively for unpaired, i.e. paired:=false. Using deviceConnected for paired:=true.
private native void enablePairedNotificationsImpl(BluetoothNotification<Boolean> callback);
private native void disablePairedNotificationsImpl();
/**
* FIXME: How to implement trusted ?
*
private native void enableTrustedNotificationsImpl(BluetoothNotification<Boolean> callback);
private native void disableTrustedNotificationsImpl();
*/
private native void setTrustedImpl(boolean value);
/* DBT native method calls: */
@Override
public native boolean connectProfile(String arg_UUID) throws BluetoothException;
@Override
public native boolean disconnectProfile(String arg_UUID) throws BluetoothException;
/**
* {@inheritDoc}
*/
@Override
public final boolean remove() throws BluetoothException {
// close: clear java-listener, super.close()
// -> DBTNativeDownlink.delete(): deleteNativeJavaObject(..), deleteImpl(..) -> DBTDevice::remove()
close();
// return removeImpl();
return true;
}
private native boolean removeImpl() throws BluetoothException;
@Override
public List<BluetoothGattService> getServices() {
try {
final List<BluetoothGattService> services = getServicesImpl();
updateServiceCache(services);
return services;
} catch (final Throwable t) {
System.err.println("DBTDevice.getServices(): Caught "+t.getMessage()+" on thread "+Thread.currentThread().toString()+" on "+toString());
if(DEBUG) {
t.printStackTrace();
}
}
return null;
}
private native List<BluetoothGattService> getServicesImpl();
@Override
public boolean pingGATT() {
try {
return pingGATTImpl();
} catch (final Throwable t) {
System.err.println("DBTDevice.pingGATT(): Caught "+t.getMessage()+" on thread "+Thread.currentThread().toString()+" on "+toString());
if(DEBUG) {
t.printStackTrace();
}
}
return false;
}
private native boolean pingGATTImpl();
/* property accessors: */
@Override
public native String getIcon();
@Override
public native short getRSSI();
@Override
public native String[] getUUIDs();
@Override
public native String getModalias();
@Override
public native Map<Short, byte[]> getManufacturerData();
@Override
public native short getTxPower ();
/**
* {@inheritDoc}
* <p>
* Native implementation calls DBTDevice::remove()
* </p>
*/
@Override
protected native void deleteImpl(long nativeInstance);
@Override
public boolean addCharacteristicListener(final GATTCharacteristicListener listener) {
return addCharacteristicListener(listener, (DBTGattCharacteristic)listener.getAssociatedCharacteristic());
}
private native boolean addCharacteristicListener(final GATTCharacteristicListener listener, final DBTGattCharacteristic associatedCharacteristic);
@Override
public native boolean removeCharacteristicListener(final GATTCharacteristicListener l);
@Override
public native int removeAllAssociatedCharacteristicListener(final BluetoothGattCharacteristic associatedCharacteristic);
@Override
public native int removeAllCharacteristicListener();
/* local functionality */
private void clearServiceCache() {
synchronized(serviceCache) {
for(int i = serviceCache.size() - 1; i >= 0; i-- ) {
serviceCache.get(i).clear();
serviceCache.remove(i);
}
}
}
private void updateServiceCache(final List<BluetoothGattService> services) {
synchronized(serviceCache) {
clearServiceCache();
if( null != services ) {
for(final BluetoothGattService service : services) {
serviceCache.add( new WeakReference<DBTGattService>( (DBTGattService)service ) );
}
}
}
}
/* pp */ boolean checkServiceCache(final boolean getServices) {
synchronized(serviceCache) {
if( serviceCache.isEmpty() ) {
if( getServices ) {
getServices();
if( serviceCache.isEmpty() ) {
return false;
}
} else {
return false;
}
}
return true;
}
}
/**
* Returns the matching {@link DBTObject} from the internal cache if found,
* otherwise {@code null}.
* <p>
* The returned {@link DBTObject} may be of type
* <ul>
* <li>{@link DBTGattService}</li>
* <li>{@link DBTGattCharacteristic}</li>
* <li>{@link DBTGattDescriptor}</li>
* </ul>
* or alternatively in {@link BluetoothObject} space
* <ul>
* <li>{@link BluetoothType#GATT_SERVICE} -> {@link BluetoothGattService}</li>
* <li>{@link BluetoothType#GATT_CHARACTERISTIC} -> {@link BluetoothGattCharacteristic}</li>
* <li>{@link BluetoothType#GATT_DESCRIPTOR} -> {@link BluetoothGattDescriptor}</li>
* </ul>
* </p>
* @param uuid UUID of the desired {@link BluetoothType#GATT_SERVICE service},
* {@link BluetoothType#GATT_CHARACTERISTIC characteristic} or {@link BluetoothType#GATT_DESCRIPTOR descriptor} to be found.
* Maybe {@code null}, in which case the first object of the desired type is being returned - if existing.
* @param type specify the type of the object to be found, either
* {@link BluetoothType#GATT_SERVICE service}, {@link BluetoothType#GATT_CHARACTERISTIC characteristic}
* or {@link BluetoothType#GATT_DESCRIPTOR descriptor}.
* {@link BluetoothType#NONE none} means anything.
*/
/* pp */ DBTObject findInCache(final String uuid, final BluetoothType type) {
final boolean anyType = BluetoothType.NONE == type;
final boolean serviceType = BluetoothType.GATT_SERVICE == type;
final boolean charType = BluetoothType.GATT_CHARACTERISTIC== type;
final boolean descType = BluetoothType.GATT_DESCRIPTOR == type;
if( !anyType && !serviceType && !charType && !descType ) {
return null;
}
synchronized(serviceCache) {
if( !checkServiceCache(true) ) {
return null;
}
if( null == uuid && ( anyType || serviceType ) ) {
// special case for 1st valid service ref
while( !serviceCache.isEmpty() ) {
final DBTGattService service = serviceCache.get(0).get();
if( null == service ) {
serviceCache.remove(0);
} else {
return service;
}
}
return null; // empty valid service refs
}
for(int srvIdx = serviceCache.size() - 1; srvIdx >= 0; srvIdx-- ) {
final DBTGattService service = serviceCache.get(srvIdx).get();
if( null == service ) {
serviceCache.remove(srvIdx); // remove dead ref
continue; // cont w/ next service
}
if( ( anyType || serviceType ) && service.getUUID().equals(uuid) ) {
return service;
}
if( anyType || charType || descType ) {
final DBTObject dbtObj = service.findInCache(uuid, type);
if( null != dbtObj ) {
return dbtObj;
}
}
}
return null;
}
}
}
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